Everyone should also go to MobyGames (a site which allows users to contribute in an attempt to create a database of info about every game ever made) and rate Grim Fandango with a high score so it gets back to the top spot of the all time best game for any platform. It used to be in first but now it's in 3rd :/. Also there are quite a few other LucasArts adventure games up there too, so vote for them aswell

You go to the game's main page, and then choose the 'rate the game' option on the right. Then give it all 5's . The top games aren't actually judged by how many people have voted for it - it's the game with the highest average rating (but only on games with above 10 user ratings qualify, although that isn't very many so sometimes you get random games no-one's heard about appearing in the top list for a few days)